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本文总结了桥梁结构可靠度的研究成果,综合考虑了桥梁运营期间,影响桥梁可靠度的各种因素:如荷载效应、碳化深度、钢筋锈蚀、粘结强度退化等。基于验算点法计算原理,编制MATLAB计算程序进行时变可靠度的求解。以福建省某在役开裂RC桥梁为依托工程,计算了该桥时变可靠度,并进行了剩余寿命的求解,根据相关计算结果得到了桥梁结构在运营初期以及结构失效期间时变可靠度下降最为迅速。相关结论也对养护时机的的合理选取提供了参考。
This paper summarizes the research results of bridge structural reliability and considers various factors that affect bridge reliability during the bridge operation period, such as load effect, depth of carbonation, corrosion of steel bar and degradation of bond strength. Based on the calculation principle of checking point method, the MATLAB calculation program is compiled to solve the time-varying reliability. Taking a cracking RC bridge in service in Fujian Province as a support project, the time-dependent reliability of the bridge is calculated and the remaining life is solved. Based on the relevant calculation results, the time-dependent reliability of the bridge structure is reduced during the initial operation and structural failure The most rapid. The relevant conclusions also provide a reference for the reasonable selection of the timing of conservation.